Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcb4c0b0d4e92f3…

MALICIOUS

PDF

76.2 KB Created: 2021-03-12 21:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 36e987b53ab362d5da726322a2b39d67 SHA-1: 542351381222d91bb836563342c919d7aaf3a415 SHA-256: 9fcb4c0b0d4e92f3cc9f9e66a943c6b2d7ff2978f57bd12b8124625bfbeb54db
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/aws?utm_term=2003+6.0+powerstroke+turbo+rebuild+kit PDF link annotation
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/a518adb.pdfIn PDF document text
    • https://libodarupebixab.weebly.com/uploads/1/3/0/9/130969674/2409025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389601/normal_6039b1d2010e3.pdfIn PDF document text
    • https://bigabupagekul.weebly.com/uploads/1/3/4/6/134667232/29e4bad5ed20.pdfIn PDF document text
    • https://fomemifeju.weebly.com/uploads/1/3/4/7/134769467/3291c5.pdfIn PDF document text
    • https://lifulufo.weebly.com/uploads/1/3/1/3/131379971/7489217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389586/normal_5ffc74212d694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503787/normal_603acc1f65bca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456989/normal_5fecf20ba67d3.pdfIn PDF document text
    • https://sexiguviwuzokal.weebly.com/uploads/1/3/4/6/134687255/favemepebap_seluvo_fuvafozoza.pdfIn PDF document text
    • https://lalusaguru.weebly.com/uploads/1/3/4/6/134611329/50349.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gebukil/wadowaroxetof.pdfIn PDF document text
    • http://tunawibiga.rf.gd/litujuwerasutir.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/10530053036.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/bugizasuboxijenur.pdfIn PDF document text
    • http://fipabadidori.epizy.com/where_to_buy_a_portable_washer.pdfIn PDF document text
    • http://sinepuguxokaza.rf.gd/machinerys_handbook_thread_depth_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/android_cannot_connect_to_wifi_authentication_error.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/vibufekanikofipebudono.pdfIn PDF document text
    • http://pewaxoxepizus.rf.gd/android_bootloader_interface_driver_windows_7_32bit.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/triangles_interior_and_exterior_angles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/pm_awas_yojana_rural_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/anemia_perniciosa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6E 5344 bytes
SHA-256: 016a3bb1aef503263e274b3c4be4b019e598f63d9d1fba160ede0fd03dbe1ae0
font_01_sfnt_off0000eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB6 11284 bytes
SHA-256: 664f76f4115fdf63cebc0a4c813bc42b5de7e7b06c4b848c5dc4975b530274ae
font_02_sfnt_off00011516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11516 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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